Relationship between Water Temperature and Oxygen Uptake in the Sea Urchin, Hemicentrotus pulcherrimus.
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概要
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In the sea urchin, <I>Hemicentrotus pulcherimus</I>, the amount of oxygen uptake (Vo<SUB>2</SUB>) was almost constant from September to June (9.6-24.2°C), except in February and March. In February and March, the ratio of organic matter weight to total body weight was the lowest in the year, but in other months the ratio was almost constant. However, Vo<SUB>2</SUB> increased with 3°C rise in the water temperature per hour interval and decreased with lowering of the water temperature. Under hypoxic conditions, until the oxygen saturation in water fell to 70.5% at 9.9°C, 62.0% at 15.3°C, 58.1% at 19.9°C, 54.7% at 24.2°C and 29.0% at 28.0°C, Vo<SUB>2</SUB> remained at the levels of the normoxic condition.
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